9c457ad27b
- move bytesWritten calculation to query the tail, allowing write() to be faster since it doesn't have to update anything extra per-write.
- enforce that all blocks are multiple-of-4 bytes big
- update the minimum block size to 4K
Before: 30ms
After: 23ms for non-4-bytes writes
13ms for 4-bytes writes
BUG=skia:
Change-Id: Id06ecad3b9fe426747e02accf1393595e3356ce3
Reviewed-on: https://skia-review.googlesource.com/6087
Reviewed-by: Mike Klein <mtklein@chromium.org>
Commit-Queue: Mike Reed <reed@google.com>
51 lines
1.3 KiB
C++
51 lines
1.3 KiB
C++
/*
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* Copyright 2016 Google Inc.
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*
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* Use of this source code is governed by a BSD-style license that can be
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* found in the LICENSE file.
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*/
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#include "Benchmark.h"
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#include "SkStream.h"
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class StreamBench : public Benchmark {
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SkString fName;
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const bool fTestWrite4;
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public:
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StreamBench(bool testWrite4) : fTestWrite4(testWrite4) {
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fName.printf("wstream_%d", testWrite4);
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}
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bool isSuitableFor(Backend backend) override {
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return backend == kNonRendering_Backend;
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}
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protected:
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const char* onGetName() override { return fName.c_str(); }
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void onDraw(int loops, SkCanvas* canvas) override {
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const char t3[] = { 1, 2, 3 };
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const char t5[] = { 1, 2, 3, 4, 5 };
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for (int i = 0; i < loops*100; ++i) {
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SkDynamicMemoryWStream stream;
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for (int j = 0; j < 10000; ++j) {
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if (fTestWrite4) {
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stream.write32(j);
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stream.write32(j+j);
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} else {
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stream.write(t3, 3);
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stream.write(t5, 5);
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}
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}
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}
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}
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private:
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typedef Benchmark INHERITED;
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};
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///////////////////////////////////////////////////////////////////////////////
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DEF_BENCH(return new StreamBench(false);)
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DEF_BENCH(return new StreamBench(true);)
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